Alexandria Engineering Journal,
Journal Year:
2021,
Volume and Issue:
61(7), P. 5213 - 5222
Published: Oct. 31, 2021
Bioremediation
has
been
considered
as
an
efficient
environmental
pollution
control
technique.
It
relies
on
microbial
cells
like
yeasts
which
are
unicellular
organisms
that
widely
used
due
to
their
availability,
easily
cultured,
economical,
and
eco-friendly.
The
immobilization
of
living
the
magnetic
nanoparticles
surface
is
a
novel
technique
obtain
nanobiocatalyst.
In
this
work,
yeast
Saccharomyces
cerevisiae
were
immobilized
Fe3O4
(MNPs)
biosorbent
remove
methyl
orange
(M.O)
dye
from
aqueous
solution
in
batch
system
through
biosorption
mechanism.
MNPs
characterized
using
XRD
SEM.
FTIR
was
characterize
before
after
biosorption.
experiments
carried
out
various
factors
such
contact
time,
pH,
M.O
concentration,
dosage,
temperature.
results
indicated
significant
removal
efficiency
96.52
%
obtained
at
optimum
conditions
pH
6.5,
50
mg/l
initial
1.5
g/l
110
rpm
shaker,
35
°C
Adsorption
isotherm
studies
illustrated
data
followed
Freundlich
model
with
correlation
coefficient
R2
>
0.99.
values
thermodynamic
parameters
estimated
showed
mechanism
exothermic
negative
value
ΔHo
(-7.8737
KJ/mol),
spontaneous
ΔGo
(−5108.22,
−6286.16,
−7475.21)
temperatures.
Moreover,
positive
ΔSo
(28.47
J/mol)
pointed
increment
randomness
interface
solution-biosorbent.
Algal Research,
Journal Year:
2024,
Volume and Issue:
78, P. 103411 - 103411
Published: Jan. 28, 2024
Toxic
elements
are
present
naturally
in
the
environment;
however,
during
last
century,
their
level
has
been
continuously
rising
air,
water,
and
soil
due
to
anthropogenic
activities,
including
urban
runoff,
pesticides
fertilizers,
industrial
effluents,
vehicle
emissions.
Once
released
environment,
they
extremely
stable,
therefore
humans
can
get
contact
with
them
through
different
routes
of
exposure.
In
addition,
because
toxicities,
increasingly
threatening
human
health.
Exposure
toxic
such
as
heavy
metals
(HMs)
might
contribute
onset
disorders
ability
generate
reactive
oxygen
species
(ROS),
which
involved
cell
macromolecule
injuries.
Moreover,
several
(arsenic
(As),
cadmium
(Cd),
nickel
(Ni),
chromium
(Cr),
beryllium
(Be))
classified
by
International
Agency
for
Research
on
Cancer
group
one
carcinogens
induce
types
cancer
various
heterogeneous
mechanisms.
Therefore,
a
better
understanding
etiopathogenesis
development
identification
new
bioactive
products
prevent
metal
carcinogenicity
is
warranted.
Microalgae,
known
wide
range
biological
could
possess
promising
metallo-protective
effect
against
metal-induced
carcinogenicity.
This
protective
mainly
attributed
antioxidant
anti-cancer
capacities
well
chelating
potential.
review
discusses
mechanisms
implicated
deep
microalgae's
mitigating
roles
strategies
reviewed.
Alexandria Engineering Journal,
Journal Year:
2021,
Volume and Issue:
61(7), P. 5213 - 5222
Published: Oct. 31, 2021
Bioremediation
has
been
considered
as
an
efficient
environmental
pollution
control
technique.
It
relies
on
microbial
cells
like
yeasts
which
are
unicellular
organisms
that
widely
used
due
to
their
availability,
easily
cultured,
economical,
and
eco-friendly.
The
immobilization
of
living
the
magnetic
nanoparticles
surface
is
a
novel
technique
obtain
nanobiocatalyst.
In
this
work,
yeast
Saccharomyces
cerevisiae
were
immobilized
Fe3O4
(MNPs)
biosorbent
remove
methyl
orange
(M.O)
dye
from
aqueous
solution
in
batch
system
through
biosorption
mechanism.
MNPs
characterized
using
XRD
SEM.
FTIR
was
characterize
before
after
biosorption.
experiments
carried
out
various
factors
such
contact
time,
pH,
M.O
concentration,
dosage,
temperature.
results
indicated
significant
removal
efficiency
96.52
%
obtained
at
optimum
conditions
pH
6.5,
50
mg/l
initial
1.5
g/l
110
rpm
shaker,
35
°C
Adsorption
isotherm
studies
illustrated
data
followed
Freundlich
model
with
correlation
coefficient
R2
>
0.99.
values
thermodynamic
parameters
estimated
showed
mechanism
exothermic
negative
value
ΔHo
(-7.8737
KJ/mol),
spontaneous
ΔGo
(−5108.22,
−6286.16,
−7475.21)
temperatures.
Moreover,
positive
ΔSo
(28.47
J/mol)
pointed
increment
randomness
interface
solution-biosorbent.
